Hi all i have had my bull x,s for the last 4 years and i,ve yet to find a breed to compare to them for what i want out of a running dog. the stamina and drive is what i like more than anything. some of the bumps my old bitch has had are un real yet after a day or to she screming to go again. dont get me rong there are some bull x,s that i,ve seen that i would,nt waste a bullet on but if the breedings there then i would reckomend this breed as an excellent all rounder.